When 5times a number is increased by 10, the answer is the same as when 100 is decreased by the number. What is the number?
1 answer:
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Answer:
True.
Step-by-step explanation:
It is because it is in the form and this equals
.
Why it is in that form: well comparing , we have
. Testing, plug in those values:
.
This has the squared form of .
Test if you like:
Use foil to expand:
First: x(x)=x^2
Outer: x(1)=x
Inner: 1(x)=x
Last: 1(1)=1
---------------Add together
It does indeed equal.